Patchwork [2/4] gcc-4.6: Backport fix for PR32219

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Submitter Khem Raj
Date Oct. 20, 2011, 7:36 p.m.
Message ID <712afcc9d364613d5f81e8f9b6f7cbbfc21e80ba.1319139126.git.raj.khem@gmail.com>
Download mbox | patch
Permalink /patch/13633/
State Accepted
Commit 3cb2b003db7371b3a47d02c08352a262e1e419b4
Headers show

Comments

Khem Raj - Oct. 20, 2011, 7:36 p.m.
This fix is needed for gold to work. Otherwise
connman fails to build since it used hidden weak
symbols.

See

http://gcc.gnu.org/bugzilla/PR32219
http://www.cygwin.com/ml/binutils/2008-02/msg00239.html

The fix proposed to gcc had reviews which were not addressed hence the
patch is not yet
applied to gcc upstream.

connman can also have workaround by changing the visibility of these
symbols to be default
 __attribute__ ((weak, visibility("hidden")))

to

 __attribute__ ((weak, visibility("default")))

in include/plugin.h

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 meta/recipes-devtools/gcc/gcc-4.6.inc           |    3 +-
 meta/recipes-devtools/gcc/gcc-4.6/pr32219.patch |   71 +++++++++++++++++++++++
 2 files changed, 73 insertions(+), 1 deletions(-)
 create mode 100644 meta/recipes-devtools/gcc/gcc-4.6/pr32219.patch

Patch

diff --git a/meta/recipes-devtools/gcc/gcc-4.6.inc b/meta/recipes-devtools/gcc/gcc-4.6.inc
index fbc90ea..469457c 100644
--- a/meta/recipes-devtools/gcc/gcc-4.6.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.6.inc
@@ -1,6 +1,6 @@ 
 require gcc-common.inc
 
-PR = "r15"
+PR = "r16"
 
 # Third digit in PV should be incremented after a minor release
 # happens from this branch on gcc e.g. currently its 4.6.0
@@ -70,6 +70,7 @@  SRC_URI = "svn://gcc.gnu.org/svn/gcc/branches;module=${BRANCH};proto=http \
            file://fix-for-ice-50099.patch \
 	   file://gcc-with-linker-hash-style.patch \
 	   file://pr46934.patch \
+	   file://pr32219.patch \
 	  "
 
 SRC_URI_append_sh3  = " file://sh3-installfix-fixheaders.patch "
diff --git a/meta/recipes-devtools/gcc/gcc-4.6/pr32219.patch b/meta/recipes-devtools/gcc/gcc-4.6/pr32219.patch
new file mode 100644
index 0000000..e310080
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.6/pr32219.patch
@@ -0,0 +1,71 @@ 
+Hi,
+
+As suggested by richi.
+regtested on i686-linux-gnu with all default languages and no regressions.
+Ok for trunk?
+
+gcc/ChangeLog
+2010-03-15  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
+
+	PR target/32219
+	* varasm.c (default_binds_local_p_1): Weak data is not local.
+
+gcc/testsuite/ChangeLog
+2010-03-15  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
+
+	PR target/32219
+	* gcc.dg/visibility-21.c: New test.
+
+Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
+---
+ gcc/testsuite/gcc.dg/visibility-21.c |   14 ++++++++++++++
+ gcc/varasm.c                         |    8 ++++----
+ 2 files changed, 18 insertions(+), 4 deletions(-)
+ create mode 100644 gcc/testsuite/gcc.dg/visibility-21.c
+
+Index: gcc-4_6-branch/gcc/testsuite/gcc.dg/visibility-21.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ gcc-4_6-branch/gcc/testsuite/gcc.dg/visibility-21.c	2011-10-18 17:11:33.224827436 -0700
+@@ -0,0 +1,14 @@
++/* PR target/32219 */
++/* { dg-do run } */
++/* { dg-require-visibility "" } */
++/* { dg-options "-fPIC" { target fpic } } */
++
++extern void f() __attribute__((weak,visibility("hidden")));
++extern int puts( char const* );
++int main()
++{
++	if (f)
++		f();
++	return 0;
++}
++
+Index: gcc-4_6-branch/gcc/varasm.c
+===================================================================
+--- gcc-4_6-branch.orig/gcc/varasm.c	2011-09-16 19:58:21.000000000 -0700
++++ gcc-4_6-branch/gcc/varasm.c	2011-10-18 17:19:06.431074788 -0700
+@@ -6760,6 +6760,10 @@
+   /* Static variables are always local.  */
+   else if (! TREE_PUBLIC (exp))
+     local_p = true;
++  /* hidden weak can't be overridden by something non-local, all
++     that is possible is that it is not defined at all. */
++  else if (DECL_WEAK (exp))
++    local_p = false;
+   /* A variable is local if the user has said explicitly that it will
+      be.  */
+   else if ((DECL_VISIBILITY_SPECIFIED (exp)
+@@ -6773,11 +6777,6 @@
+      local.  */
+   else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
+     local_p = true;
+-  /* Default visibility weak data can be overridden by a strong symbol
+-     in another module and so are not local.  */
+-  else if (DECL_WEAK (exp)
+-	   && !resolved_locally)
+-    local_p = false;
+   /* If PIC, then assume that any global name can be overridden by
+      symbols resolved from other modules.  */
+   else if (shlib)